The epidermis is thicker on the palms and soles than it is anywhere else and is usually thicker on dorsal than on ventral surfaces.

• True

• False

Your skin is your body’s largest external organ. It provides a barrier between your body’s essential organs, muscles, tissues, and skeletal system and the outside world. This barrier protects you from bacteria, changing temperatures, and chemical exposure.

• True

• False

Your dermis is constantly shedding dead skin cells from the top layer and replacing them with new healthy cells that grow in lower layers.

• True

• False

The dermis is thicker than the epidermis and contains all sweat and oil glands, hair follicles, connective tissues, nerve endings, and lymph vessels.

• True

• False

Does the endocrine system help with the overall health of the human body?

• True

• False

Since the epidermis contains collagen and elastin, it also helps support the structure of skin that we see.

• True

• False

Protractor musclse is a muscle drawing a part forward, as antagonistic to a retractor.

• True

• False

Endocrine glands are tissues or organs that excrete electrical substances (hormones) directly into the blood.

• True

• False

If your endocrine system isn't healthy, you might have problems developing during puberty, getting pregnant, or managing stress. You also might gain weight easily, have weak bones, or lack energy because too much sugar stays in your blood instead of moving into your cells where it's needed for energy.

• True

• False

• None of these

Many glands make up the endocrine system. The hypothalamus, pituitary gland, and pineal gland are in your brain.

• True

• False